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Petri dishes
In the field of microbiology, petri dishes are used in particular to culture cells, cultivate microorganisms like bacteria and detect contamination. They are one of the most common basic equipment in modern laboratories and have many uses. Some petri dishes are also used to evaporate liquids to collect residue left behind after evaporation.
However, there are differences among the laboratory dishes. Not every type of petri dish is suitable for every application. Certain requirements should be considered selecting a petri dish:
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Size |
Depending on the application, different diameters fit better or less well. Most Petri dishes are available in diameters of 35, 60, 94 and 145 mm. |
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Temperature |
When working with hot agar, special attention must be paid to the material of the Petri dish. Heat resistant clear polystyrene is very suitable for high temperatures in the dish. |
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Gas Exchange |
If a particularly good gas exchange is required during the test, the use of Petri dishes with aeration cams is recommended. |
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Multi-parameter Measurement |
If an application requires the simultaneous observation of several parameters, Petri dishes with two or three separated areas in the dish are particularly suitable, as several areas can be observed simultaneously and independently of each other. |
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Application: Germ Counting |
If a user wants to use the Petri dishes for counting bacteria, there are dishes with subdivisible 10 mm squares. These enable quick evaluation and are well suited for use in germ counting. |
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Application: Hygiene Control |
If the application involves the process of hygiene control, the use of contact trays is recommended. These are usually available with the above subdivisions and additional venting cams. |